• ISSN 1008-505X
  • CN 11-3996/S
徐卫红, 王正银, 李传林. 施氮和不同品种水稻对紫色水稻土钾素形态的影响[J]. 植物营养与肥料学报, 2000, 6(4): 389-396. DOI: 10.11674/zwyf.2000.0405
引用本文: 徐卫红, 王正银, 李传林. 施氮和不同品种水稻对紫色水稻土钾素形态的影响[J]. 植物营养与肥料学报, 2000, 6(4): 389-396. DOI: 10.11674/zwyf.2000.0405
XU Wei hong, WANG Zheng yin, LI Chuan lin. Effect of nitrogen application and rice cultivars on forms of potassium in different purple paddy soils[J]. Journal of Plant Nutrition and Fertilizers, 2000, 6(4): 389-396. DOI: 10.11674/zwyf.2000.0405
Citation: XU Wei hong, WANG Zheng yin, LI Chuan lin. Effect of nitrogen application and rice cultivars on forms of potassium in different purple paddy soils[J]. Journal of Plant Nutrition and Fertilizers, 2000, 6(4): 389-396. DOI: 10.11674/zwyf.2000.0405

施氮和不同品种水稻对紫色水稻土钾素形态的影响

Effect of nitrogen application and rice cultivars on forms of potassium in different purple paddy soils

  • 摘要: 通过盆栽试验研究了施氮水平和不同品种水稻对四川盆地 3种典型紫色水稻土 5种钾形态的影响以及各种土壤钾形态对水稻钾素营养的贡献。结果表明 ,4个紫色水稻土供钾能力均属中下水平 ,全钾含量为 1.29%~2.62% ,其中矿物钾量平均占 96.82% ,速效钾和非交换性钾仅平均占 0.62%和 2.56% ,土壤供钾能力以中性紫色水稻土 石灰性紫色水稻土 酸性紫色水稻土。施氮 (N 0~ 150mg/kg)促进 4个紫色水稻土钾素的释放 ,提高水稻对非交换性钾和矿物钾的吸收利用 ,使矿物钾和非交换性钾的贡献占植株吸钾的 80.3% ,速效钾仅为 19.7%。中性紫色土供试 4个品种水稻的吸钾能力为开优 5号 汕优 63Ⅱ优 6078引佳 1号。施氮后4个品种水稻吸自非交换性钾和矿物钾量平均占植物吸钾量的 66.9% ,以施中氮 (N 150mg/kg)时植株吸钾量最高 ;而低氮或高氮水平都不利于植物对钾的吸收和土壤钾的释放

     

    Abstract: Pot experiment was adopted to study the effects of nitrogen supplying levels and rice cultivars on five forms of soil K in three purple paddy soils in Sichuan basin. Results indicated that the total K in the tested purple paddy soils was low to medium ranged from 1.29% to 2.62%, and mineral K accounted for 96.82% while quickly availble K and slowly available K only accounted for 0.62% and 2.56%, respectively on average. The potassium supplying power of the tested soils showed the following order neutral purple paddy soilcalcareous purple paddy soilacid purple paddy soil. Nitrogen application(0~150mg/kg) increased the release of soil potassium and the utilization of non exchangeable K and mineral K. In accordance with the total amount of net K uptake by rice, the contribution of non exchangeable K and mineral K accounted for 80.3%. The capability of potassium uptake by four rice cultivars was Kaiyou 5Shanyou 63Eryou 6078Ying jia 1 in neutral purple soil. Contibution of non exchangeable K and mineral K to K uptake by four rice cultivars accouted for 66.9% after the application of nitrogen fertilizer on average. The maximun of net K uptake by four rice cultivars were obtained at medium nitrogen level (N 150mg/kg). It was not beneficial to the K uptake by rice and the release of soil mineral K at low or high nitrogen level.

     

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